bader22 - Free Online Quiz Maker

Q1 Score: 2.04

a- Atriple-strandstructure

b- TheDNAstrandsrunninginoppositedirections

c- BasepairingbetweenbasesA&G.

d- Covalent bonding between bases.

Q2 Score: 2.04

a- Ribose

b- 2'-deoxyribose

c- 5'-deoxyribose

d- Any of the above.

Q3 Score: 2.04

a- N-glycosidic linkage

b- Peptide bond

c- Phospho diester bond

d- Hydrogen bond.

Q4 Score: 2.04

a- IsregulatoryrepeatingstructureofDNA&histonesproteins.

b- HasacoreofDNAwithproteinswrappedaroundtheoutside

c- Usesonlyonetypeofhistonespernucleosome

d- Is separated from a second nucleosome by non-histone protein.

Q5 Score: 2.04

1- The two nucleotide strands are held together by hydrogen

The number of thymidylate subunits should equal the number of deoxycytidylatesubunits

The number of deoxyadenylate subunits is essentially equal to the number of deoxyguanylate subunits

All the above is true.

Q11 Score: 2.04

a- dehydrated,carbon3.

b- Oxygenated,carbon2.

c- Oxygenated,carbon3.

d- Deoxygenate,carbon2

Q12 Score: 2.04

a- A=3100 , T=2600 , C=2600 , G=3100.

b- A=3000 , T=2200 , C=3400 , G=3200.

c- A=2600 , T=2600 , C=3300 , G=3300.

d- A=3300 , T=3300 , C=2600 , G=2600.

Q13 Score: 2.04

a- DNA ispolydeoxynucleotide

DNAexistsasadoublehelixoftwocomplementaryanti- parallel strands

c- Thymidylate is a distinctive component of D

DNAhas3'-endsononeside,&two5'-endsontheotherside.

Q14 Score: 2.04

a- A&TrichDNAdenaturesatalowertemperaturethanG&C rich DNA

b- Denaturationcausesanincreaseinabsorbanceat260nmofa DNA solution

c- Both (a) & (b).

d- Neither(a)nor(b).

Q15 Score: 2.04

a- 5'GTTCCCAA-3'.

b- 5'TTGGGAAC-3'.

c- 3'TTGGGAAC-5'.

d- 3'-GTTCCCAA-5'.

Q17 Score: 2.04

a- Theindividualstrandsarenothelical

b- Hydrogenbondsformbetweenpurine&pyrimidinebaseon the samestrand.

c- Adenine on one strand is hydrogen bonded to thymine on the opposite strand

d- Phosphodiesterbondsareorientedtowardtheinteriorofthe helix

Q18 Score: 2.04

a- Adenine & cytosine.

b- Guanine & thymine.

c- Adenine & guanine.

d- Thymine & uracil.

Q19 Score: 2.04

a- Deoxynucleic acid.

b- Deoxyribonucleic acid.

c- Deoxyribodeoxynucleic acid

d- Dioxyribonucleic acid

Q20 Score: 2.04

a- A nitrogen base & ribose.

b- A nitrogen base , a pentose & phosphate.

c- A nitrogen base & phosphate

d- Any of the above

Q21 Score: 2.04

a- Adenine equals thymine

b- Adenine equalsuracil

c- Guanine equals adenine.

d- Cytosineequalsthymine

Q23 Score: 2.04

a- A nucleoside

b- A nucleotide

c- A purine ring.

d- A pyrimidine ring

Q24 Score: 2.04

a- A nucleoside phosphate

b- Ribose diphosphate

c- A nucleoside minus phosphate

d- A hydrolytic product of nucleosides

Q26 Score: 2.04

a- ThehelicalstructureofDNAhasamajor(wide)groove&a minor (narrow)groove.

b- Regulatoryproteinsbindtothemajor&minorgrooves, regulating DNA & RNA synthesis.

c- Separation of the two DNA strands from each other occurs at high temperature & is called reannealing.

d- Themeltingtemperature(Tm)isthetemperatureatwhichhalf of the helical structure of DNA is lost.

Q27 Score: 2.04

a- ContainscovalentlylinkedRNA&DNA.

b- ContainsacoreoftwoeachofhistonesH2A,H2B,H3&H4.

c- Requireaspecificbasesequenceforformation

d- ContainacoreoftwoeachofhistonesH1,H2,&H5.

Q32 Score: 2.04

a- Pyrimidine + pentose + phosphate.

b- Purine + pentose + phosphate.

c- Purine or pyrimidine + pentose.

d- Purine or pyrimidine + phosphate

Q33 Score: 2.04

a- Cleavage of the phosphodiester bonds.

b- The formation of triple helix.

c- A decrease in light absorption at 260 nm.

d- Thedenaturatedtemperatureisdirectlyrelatedwiththeguanine & cytosine contents.

Q34 Score: 2.04

a- Phosphoric acid.

b- Pentoses

c- Adenosine

d- Cytosine

Q35 Score: 2.04

a- Deoxyguanylate&deoxycytidylateareattachedtoeachother by two hydrogen bonds.

Threehydrogenbondsexistbetweendeoxyadenylate

c- The A-T attraction is about 50% stronger than the C-G attraction

d- Noneoftheaboveistrue

Q36 Score: 2.04

a- Deoxyuridylate

b- Deoxyguanylate

c- Deoxyadenylate

d- Deoxycytidylate

Q37 Score: 2.04

a- Buildingunitsofnucleicacids

b- Sources of highenergy

c- Second messengers

d- Structuralcomponentsofmembranes

Q38 Score: 2.04

a- DNAisfoundassociatedwithproteins,formingnucleoprotein.

b- The5'-endofonestrandofDNAisbase-pairedwiththe3'-end of the other strand.

c- Phosphodiester bonds are heat resistant , but can be cleaved by nuclease enzymes.

d- DenaturationofDNAresultsfromdisruptionofphosphodiester bonds

Q39 Score: 2.04

a- histones Pts. (proteins)

b- non-histones Pts.

c- both a & b.

d- neither a nor b

Q40 Score: 2.04

a- DNAisdoublestrandedwhileRNAisabsolutelysingle stranded

b- DNAisresponsibleforstoringgeneticinformation&their transfer to daughter cells.

c- RNA is responsible for expressing the genetic information in the form of protein molecules.

d- DNAislocatedinthecellnuclei,whileRNAislocatedonlyin the cytoplasm

Q41 Score: 2.04

a- 2'-hydroxylofonenucleotideto3'-hydroxylofthe ABCDE 1 2 3 4 5 6 Yourscore:.../6 6- following

b- 3'-hydroxylofonenucleotideto3'-hydroxylofthefollowing.

3'-hydroxyl of one nucleotide to 5'-hydroxyl of the following.

d- 5'-hydroxylofonenucleotideto5'-hydroxylofthe following.

Q42 Score: 2.04

a- Hydrogenbond

b- Phosphodiester bonds.

c- Glycosidicbonds

d- all theabove

Q43 Score: 2.04

a- Adenine + guanine.

b- Cytosine+thymine.

c- Adenine +thymine.

d- Cytosine+guanine

Q44 Score: 2.04

a- Hasfewerbasepairs/turnthanBDNA helix.

b- Is permanent conformation of DNA.

c- HasahighcontentofCGsequence

d- Right handed double helix.

Q45 Score: 2.04

a- Thetwoendsarestructureequivalent

b- Themonomericunitsjoinedtogetherbyphosphodiester bonds

c- There are at least 20 different monomers that can be used.

d- Themonomericunitsarenotseparatedbyhydrolysis

Q46 Score: 2.04

a- Appearanceofthemajor&minorgrooves.

b- Thickness of the helix

c- Polarity of the strands.

d- Numberofbasepairs/turn.

Q47 Score: 2.04

a- Hydrophobic interactions

b- Phosphodiester bond.

c- Vanderwaalsforce

d- Hydrogen bond.

Q48 Score: 2.04

a- DNAisformedoftwobranchedpolydeoxyribonucleotide chains

b- DNAissynthesizedbypolymerizationofdeoxynucleotides

c- DNAispresentinthenucleusandthemitochondria

d- BacterialDNAispresentinthesinglechromosome&the plasmids.

Q49 Score: 2.04

a- Poly-nucleoside

b- Poly-nucleotide

c- Either (a) or (b).

d- Neither (a) nor. (b)